X    radiator cap



H. E. MAURER, 1n.

RADIATOR CAP. APPLICATION HLED ocT: so. |920.

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-Il l latcnterl met. d, 19ML "HENRY n. manana, an., or srnrnsrrntn, ILLINOIS.

RADIATOR CAP.

Application led October` 30, 1920. Serial No. 420,749.

To allzu/tom #may concern:

Be it known that I, Hanni E, Manner., Jr., a citizen ofthe United States, residing at Springfield, in the countyof Sangamon `and State of Illinois, have invented a new and useful Radiator Cap. of which the tollewin@y 1 a specification..

` 'lhe nivention relates to caps lor the radiators of internal cornl istion enofines and `partieularly relatesto radiator caps in conjunction with which devices known as inotoaneters` are used to indicate the temperature existing in the radiator.

lt is common to attach moto-meters to the detachable` capsof radiators. rllhe l nictometers are separate articles `of manufacture, readily saleable as accessories to various radiators, and being of considerable value, are often stolen. The fact 4that the caps cominonly used may be quickly unscrewed, carrying the moto-meters with them, makes theft easy land detection `diicult.

The purposes of theinvention are: to pro` vide a radiator cap permanently attached in the neck of the radiatorand adapted to securely Ahold a moto-meterse that 1t cannot be detached from theradiator cap; to proA vide a radiatorcaphaving an inclined duct extended forwardly beyond the front end of the radiator in such position that the level of the water in the tank may be viewed through the duct and in' such position that water spilled while lilling the radiator will not fall on and mar theradiator; to provide means for holding the moto-meter so that it will always face directly rearward;`

to provide as an integral part of the cap, an upwardly extended duct-member in such relation to a moto-meter supported on and having a stern` extending into the cap, the moto-meter cannot be given a complete rotation in an attempt to detach it. so long as the cap remains on the radiator; to provide means to prevent the detaching of the motometer by means of an instrument inserted through the duct; and to provide improved. details of construction.

The invention is illustrated in the annexed drawing, to which reference is hereby made and will now be fully described and the novel features thereof will be recited in the claims.

Figure 1 is a front elevation of a radiator cap embodying my invention; Fig. 2 1s a vertical section through the radiator cap on the line 2, 2, of Fig. 1; Fig. 3 is areduced top plan `of the saine radiator cap, the moto-r meter being; omitted; and Fig. 4l is a top plan of the detached duct closure. rlfhe saineA reference numeralsdesignate the parts in allthe views.

` The moto-meter 5, shown in the drawings1 is of common construction, except that part of its screw is filed away to form a flat surface 19, for a purpose hereinafter explained.

`The niotoeineter proper is not part of the present invention and therefore need not be described in detail. y

The bodyor main structure of the radiator cap is a metal casting,.preferably alurninum7 on account of its lightness and the facility with which it may be attractively finished, and comprises in one piece a cylinder 6, a forwardly and upwardly inclined duct 7, an internal arched balileplate 8, handles9 used to rotate the radiator cap and a screw 10 adapted to engage the usual internal screw threads in the neck 28 of the radiator to which. the radiator cap is to be applied. i

The duct 7 has internal; screw threads 12. The duct closure 13 has an integral screw 14 engaging with the screw threads 12 to des tachably connect the closure withthe duct,

v and also has radial wings 15 useful for rotating the closure.

The cylinder 6 has in its top a central opening` 16 (Fig. 3) admitting of free insertion of the screw threaded stein 18 of the moto-meter 5 and also has a keyway 17. To adapt the moto-1neter for use with the radia tor cap a'portion of the moto-meter stem 18 will be led away to form a longitudinal flat surface 19. HWhen the parts arev assembled, the key 2O inserted in the way 17 will bear against the flat surface 19 to prevent y rotation of the stem 18 in the opening 16. A soft metal disk 2l supports the motometer on top of the cylinder. A. gasket 22 and a washer 23 surround the stem 18. A nut 24 screwing on the stein 18 prevents longitudinal movement of the stem inthe openin 16.

thiinble 25 screws on the stem 18 and locks the nut 24.

Here it is to be noted that the arched baille plate 8 extends downwardly a considerable distance and thereby restricts the throat 29 ofthe duct so that any instrument which can be inserted through the throat will not be effective to rotate the nut "24, or tov hold the nut so that the stem 18 may be rotatedin the nutin an attempt to detach the moto-meter from the radiator nternally screwthreadedv holes 30 in the wall of the radiatorv neck are registrable with the holes 26 in the wall of the screw member 10.

When the radiator cap is in place on thel neck 28, screws 27 will .be screwed into the registering holes 30 and 26, to securely con# `nect the radiator cap with the neck the out- Y wardly projecting partys of the screws will then be cut oi vclose to the outer Ysurface of the neck and the ends yof the stub screws will be finished smoothly so that they cannot Vdownwardly inside the radiator cap andv is directly subject to changes of temperature in the radiator; hence the moto-meter will accurately indicate the temperature and the moto-meter being. firmly held facing the of-the meter. j v y l Thev `devices connecting the moto-meter with the radiator cap are all inside the cap,

and inaccessible from the outside; the cap ituser,'it is easy for him to take the reading v Self is permanently attached to the radiator and the forwardly vand upwardly extended (duct admits of filling the radiator without vdisturbinv the moto-meter and alsop'revents any comp ete rotationl of` the moto-meter;

hence the risk of damage to or theft of the moto-meter is reduced to the minimum.'

Having fully described my invention,

what I claim as new and Vdesire to secure by Letters Patent is:

1. A` radiator cap comprising a cylinder having a terminal screw adapted to engage screw threads on the neck of a radiator, an upwardly extended and forwardly inclined duct-member integral with t-he cylinder and having a throat communicating with the interior of the cylinder, a downwardly extended baflle plate integral with cylinder :md contiguous to the throat of the duct, and a detachable closure in the free end of the duct-member.

2. In an appliance of the class described, the combination `of a radiator; a cylinder permanently attached to the radiator and iaving on its top a central opening und a ke -way; a duct communicating with said cy inder; a moto-meter having a stem fixed on said moto-meter and extending through said opening in the top `of said cylinder; a key in said key-way preventing rotation of said stem; securing devices preventing longitudinal movement of said stem; and a baille plate at the juncture of said duct with said cylinder and preventing access to said securing devices.

3. In an appliance of the class described,

a radiator cap comprising a stationary cylndrical body having an upwardly and for Vwardly extended duct-member, in combination with a moto-meter mounted on the c linder body in such relation to said upwardly extended duct-member that the duct-member will prevent complete rotation of the motometer on said cylinder.

In witness whereof I have hereunto signed my name at Springfield, Illinois, this 27 day of October, A. D.r 1920.

HENRY E. MAURER, JR.

Witnesses:

GEORGE H. HELMLE, C. E. ESTES. 

